I have one, about 4-5" now. It's been a great fish for me and has recently starting to develope more orange and red. It eats anything eagerly. Mine hasn't been aggressive to this point, but is not bullied either.
I like my mayan; I've had him for about a year now and he's 5". I caught him in the everglades last year. However he doesn't have much of a "personality" as far as cichlids go.